Optical spectroscopy study of neodymium in sodium alumino-borosilicate glasses

Over the composition range from peraluminous to peralkaline (RPA=Na2O/(Na2O+Al2O3) from 0 to 1), ultraviolet–visible spectroscopy was used to study the local environment of Nd–O in glasses (molar composition): 60SiO2·15B2O3·xNa2O·(25−x)Al2O3·yNd2O3 (0⩽x⩽25 and y=solubility limit). Our study focused...

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Bibliographic Details
Published in:Journal of non-crystalline solids 2004-12, Vol.349 (Complete), p.127-132
Main Authors: Li, Hong, Li, Liyu, Strachan, Denis M., Qian, Maoxu
Format: Article
Language:English
Subjects:
alumino borosilicate glass
ASYMMETRY
BORATES
CATIONS
COVALENCE
Exact sciences and technology
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
Judd Ofelt theory
MATERIALS SCIENCE
NEODYMIUM
optical spectroscopy
OSCILLATOR STRENGTHS
Physics
RARE EARTHS
SODIUM
SOLUBILITY
SPECTROSCOPY
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Summary:Over the composition range from peraluminous to peralkaline (RPA=Na2O/(Na2O+Al2O3) from 0 to 1), ultraviolet–visible spectroscopy was used to study the local environment of Nd–O in glasses (molar composition): 60SiO2·15B2O3·xNa2O·(25−x)Al2O3·yNd2O3 (0⩽x⩽25 and y=solubility limit). Our study focused on Judd–Ofelt oscillator strength parameters: Ω2 – ligand field asymmetry and Ω6 – bond covalence. We explain the similarity between Ω2/Ω6 and the Nd2O3 solubility curve in terms of Nd partitioning into borate- and silicate-rich environments. However, Ω2/Ω6 is nearly independent of RPA for the glasses containing Nd2O3 at the solubility limit irrespective of glass composition, suggesting that average local Nd–O environment is nearly the same for all glasses.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2004.08.219